User blog comment:Andreiva13/How i should train .....?/@comment-31267872-20171224162057

Beldum grows very slowly. If you want an EV trained one, you should EV train Beldum/Metang (if it evolves), then go to the EXP Hotspot at Decca Beach and try and get it to Metagross.

If you don't care about EVs, go straight to the EXP Hotspot.